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Table 1 Characteristics of Millennium Cohort participants and Family Survey response – included in final response propensity model

From: Assessing and adjusting for non-response in the Millennium Cohort Family Study

Characteristic Prevalence of characteristicsa Percent responding to Family Survey P-value
Unweighted n Prevalence
Total 28,603 100.00 34.3  
Demographic, service, and administrative characteristics
 Gender
  Male 21,984 86.0 37.1 <0.0001
  Female 6619 14.0 16.6  
 Age
  17–24 years 12,378 48.3 31.0 <0.0001
  25–29 years 10,797 35.5 37.5  
  30+ years 5428 16.2 37.1  
 Race/ethnicity
  White, non-Hispanic 21,294 69.6 37.6 <0.0001
  Black, non-Hispanic 2470 12.1 22.1  
  Hispanic 2602 10.8 29.1  
  Other 2237 7.5 30.2  
 Education
   < High school completion/diploma 51 0.2 19.9 <0.0001
  High school degree/GED/or equivalent 5477 24.2 29.8  
  Some college (including 2 years degree) 15,469 57.4 33.4  
  Bachelor’s degree 5414 14.1 41.9  
  Advanced degree 2192 4.1 46.7  
 Income
   < $50,000 15,912 62.5 33.5 <0.0001
  $50,000–$74,999 5799 18.4 37.2  
  $75,000+ 4817 11.1 41.1  
  Missing 2075 7.9 24.2  
 Number of dependent children
  None 12,664 44.6 32.2 <0.0001
  One 7865 27.5 35.2  
  Two 5205 18.0 36.6  
  Three or more 2869 9.8 36.8  
 Component
  Active duty 22,365 78.9 34.1 0.1408
  Reserve/National Guard 6238 21.1 35.1  
 Service branch
  Army 12,949 50.3 34.7 0.0001
  Navy/Coast Guard 4698 17.1 35.7  
  Marine Corps 2649 15.3 34.4  
  Air Force 8307 17.4 31.6  
 Pay grade
  Enlisted 23,505 91.0 32.8 <0.0001
  Warrant/commissioned officer 5098 9.0 48.7  
 Deployment/combat
  Not deployed 6276 19.5 31.3 <0.0001
  Deployed, no combat 3357 10.7 33.7  
  Deployed, in combat 17,977 65.9 36.0  
  Deployed, combat unknown 993 4.0 21.4  
 Panel 4 survey completion
  Complete 27,045 93.9 35.1 <0.0001
  Partial 1558 6.1 20.8  
 Panel 4 respondent referred spouse
  Yes 8319 28.9 64.5 <0.0001
  No 20,284 71.1 22.0  
Health behaviours
 Average hours of sleep/day
  <6 h 6848 27.76 32.2 <0.0001
  6 h 8192 28.95 34.1  
  7 h 6939 21.53 39.2  
  8 h 4707 15.01 34.1  
  >8 h 1298 4.43 32.4  
  Missing 619 2.33 19.7  
 Description of usual activities
  Sit during day and do not walk much 6581 20.5 35.2 <0.0001
  Stand/ walk a lot, little lifting 11,052 37.5 32.9  
  Light loads, or climb often 7893 29.4 35.5  
  Heavy work 2499 10.3 36.8  
  Missing 578 2.2 20.5  
Physical health indices
 Body mass index
  <25.0 10,612 34.3 33.7 <0.0001
  25.0–29.9 13,710 49.5 35.3  
  30.0+ 3893 14.9 33.9  
  Missing 388 1.3 14.7  
 Days unable to work due to illness/injury
  None 16,622 58.2 34.4 <0.0001
  1–5 days 6456 21.1 34.6  
  6–15 days 2196 7.9 32.9  
  16+ days 2657 10.4 35.7  
  Missing 672 2.4 25.0  
Mental health indices
 VR-36 mental component score
  Lowest 15% 3611 14.1 31.6 <0.0001
  Middle 70% 19,279 66.5 35.4  
  Highest 15% 4335 14.0 35.9  
  Missing 1378 5.3 22.6  
 Having no one to turn to when you have a problem
  Not bothered 22,717 77.4 35.6 <0.0001
  Bothered a little 3699 14.0 31.2  
  Bothered a lot 1674 6.8 29.8  
  Missing 513 1.8 18.5  
 Financial problems or worries
  Not bothered 16,001 51.7 35.0 <0.0001
  Bothered a little 8846 33.1 35.4  
  Bothered a lot 3314 13.6 30.7  
  Missing 442 1.6 18.2  
 Overall attitude about military service
  Negative/somewhat negative 4773 17.3 32.8 <0.0001
  Neither negative or positive 3713 13.7 30.7  
  Positive/somewhat positive 18,264 61.8 36.7  
  Missing 1853 7.12 23.4  
Trauma
 Stressful events since 2008
  None 12,035 40.9 34.8 <0.0001
  1 or 2 11,434 40.0 36.2  
  3 or more 3626 13.3 32.6  
  Missing 1508 5.9 21.1  
  1. aUnless specified as "unweighted", all table values are weighted with the Normalized Adjusted Weight 1 [Design weight with raking adjustment for non-response to P4W1]